One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,11,13,16)(4,9)(5,10)(6,8)(7,12,15,14)(17,18)(19,27,30,40)(20,31)(21,34,36,25)(22,26)(23,29)(24,32)(28,42,43,41)(33,39,47,46)(35,38)(37,48)(44,45)(1,3)(2,7)(4,12)(5,14)(6,13)(8,15)(9,11)(10,16)(17,19,22,30)(18,23,26,38)(20,28,32,43)(21,35,36,29)(24,37,31,45)(25,40,34,27)(33,48,47,44)(39,42,46,41)(2,8)(7,15)(9,10)(11,16)(17,20,22,32)(18,24,26,31)(19,28,30,43)(21,33,36,47)(23,37,38,45)(25,39,34,46)(27,41,40,42)(29,44,35,48)(1,4,6,5)(2,9,8,10)(3,12,13,14)(7,11,15,16)(20,32)(24,31)(28,43)(33,47)(37,45)(39,46)(41,42)(44,48)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.